单击滚动视图 [英] Clicking a scroll view

问题描述

我有一个滚动视图，它有一个 Linearlayout 子元素，这个 linearlayout 有一个 drawingview.

I have a scroll view that has a Linearlayout child and this linearlayout has a drawingview.

问题:我尝试了有关该主题的几乎所有可用答案，但没有一个奏效，我无法理解为什么没有为(滚动视图、线性布局甚至绘图视图)触发点击.

the problem : I tried almost all the available answers on this topic and none of them worked, I cant understand why click is not fired for (scrollview, linear layout and even drawingview).

注意:我尝试为三个中的每一个设置点击，但没有任何效果.

note : I tried setting on click for each of the three and none worked.

xml 代码:

<ScrollView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="@id/scrollview"
android:clickable="true"
>

<LinearLayout
android:setorientation="vertical"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="@id/linear"
android:clickable="false">


<Customview
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="@id/draw"
android:clickable="false"/>

</LinearLayout>
</ScrollView>

推荐答案

首先你的 ScrollView ，layout_height 被包裹了！对于您给 match_parent 的孩子，我怀疑您的视图甚至不会显示.不是吗?

First your ScrollView ,layout_height is wrapped! and for children you gave match_parent i doubt your view won't even display. Isn't it?

那么不知道为什么你使用 setorientation 和 android:id="@id/draw" 而不是 android:orientation 和 >android:id="@+id

Then no idea why you use setorientation and android:id="@id/draw" instead of android:orientation and android:id="@+id

如果你想检查滚动工作使用

If you want to check scrolling works use

   scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                Log.d("TAG", "onScrollChanged: ");
                // DO SOMETHING WITH THE SCROLL COORDINATES
            }
        });

您正在使用不必要的属性检查此示例:

You are using unnecessary attributes check this example :

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#8768"
    android:orientation="vertical">

    <ScrollView

        android:id="@+id/scrollIndicatorDown"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#823">

        <LinearLayout
            android:id="@+id/first_child"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:background="#900"
            android:orientation="vertical">

            <LinearLayout
                android:id="@+id/linear_layout"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:background="#000"
                android:orientation="vertical"></LinearLayout>

            <LinearLayout
                android:id="@+id/web_view"
                android:layout_width="match_parent"
                android:layout_height="500dp"
                android:background="#987"
                android:orientation="vertical"></LinearLayout>


        </LinearLayout>
    </ScrollView>

</LinearLayout>

如果您将 onClickListner 写入 id linear_layout 它就可以正常工作！

If you write an onClickListner to the id linear_layout it just work normally!

答案:ScrollView 的子视图正在消耗您在 ScrollView 上执行的点击事件.

Answer :The child Views of your ScrollView are consuming the click events you do on the ScrollView.

解决这个问题的方法是将onClickLIstener设置为ScrollView的直接子元素(它的子元素).

The solution to this problem is to set the onClickLIstener to the immediate child of the ScrollView(It's child).

所以根据我的例子，如果我想找出 ScrollView onClick 我写我的听众给它的孩子.

So according to my example if i want to find out the ScrollView onClick i write my listener to its child.

 scrolChild =(LinearLayout) findViewById(R.id.first_child) ;


        scrolChild .setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(YourActivityName.this, "You Clicked Me OH yeaaaaa", Toast.LENGTH_SHORT).show();
            }
        });

当您需要 androidclickable-true 时阅读此处 android:clickable=true";意思是它不可点击?

Read here when you need androidclickable-true android:clickable="true" mean's that it's not clickable?

这是我的活动

   public class MainActivity extends AppCompatActivity {


    private ScrollView scrollView;

    private LinearLayout scroolChild;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.web);

        scrollView = (ScrollView) findViewById(R.id.scrollIndicatorDown);
        scroolChild =(LinearLayout) findViewById(R.id.first_child) ;


        scroolChild.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "You Clicked Me OH yeaaaaa", Toast.LENGTH_SHORT).show();
            }
        });

        scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                Log.d("TAG", "GotAScrollChanged: ");
                // DO SOMETHING WITH THE SCROLL COORDINATES
            }
        });


    }
}

这篇关于单击滚动视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！